/Engine/Source/Runtime/Projects/Public/Interfaces/IPluginManager.h
Sets the delegate to call to unregister a new content mount point. This is used internally by the plug-in manager system and should not be called by you. This is registered at application startup byFPackageNamecode in CoreUObject.
void SetUnRegisterMountPointDelegate ( const [FRegisterMountPointDelegate](API\Runtime\Projects\Interfaces\IPluginManager\FRegisterMountPointDelegate) & Delegate )